Assictqb ojt one-hale to



'May 15, 1923. 5 1,455,285

w, H. EASTMAN TELEPHONE INDI GATOR Filed, June 1. 1922 12 lnvenTor.

WilIiam H. EusTmun b WMkM Aflys Patented May 15, 1923. I i i v p barren stares Mimi orFicE.

VTILLIAIVI n. EASTMAN, oroonoonn, NE HAMPSHIRE, nssrenon or ONE-HALF To nnnsnnr o. vrnrrnnr, or PENACODK, new nnnrsnrnn TELEPHONE INDICATOR.

Application filed June 1, 1922. Serial No. 565,172;

Toallwhom it may concern." parts of thetelephoneset largely in dia- 55 Be it known that I, VJI LIAM H. EAST- gram. I i I MAN, a citizen otthe United States, and 1 indicates a transmitterot a telephone resident of Concord, county of Merrimack, set, which is connected by a wire 2 of the 5 State of New Hampshire, have invented an local circuit to the winding 3 of the usual Improvement. in Telephone indicators of induction coil 1 the'other winding 501 said 60 which the following description, in conneccoil being connected in the telephone line 6. tionfwith the accompanying drawing, is a The coil 3 is also connected by the wire 7 specification, like characters on the drawing v to the battery terminal 8 to which the cir-.

10 representing like parts. I cuit '10 of the local battery 9 is connected,

Thisfinvention relates to an indicator for said circuit being also connected to the other 05 a telephone designed-to give an indication battery terminal .11. 12 is the receiver-sup-- to' a party using the. line Whenever the reporting arni'corresponding to the ordinaryceiver of some other party on the same line book of a telephone set said arm'being piv'- 15 is removed from its hook andto givethe inotedat 13 and being acted on by a spring dication in such a way that the first-named 1 1 which raises it when the receiver 16 is reparty can tell which particular subscriber moved therefrom. When the "receiver is I on the party line hasremoved his receiver supported on the arm 12 it forms a contact from-the hook and is attempting to listen in. atlo thereby closingthe ringing circuit all 20 The invention is specially useful in rural as usual "in telephone construction.

districts where there are several subscribers 111 carrying out my improvements I proonthe same telephone line, because any subvide an indicating circuit in shunt with the scriber'wh'o is using his telephone will be local transmitter circuit and having an indi :u automaticallyinformed as to which one or cator therein andl also'provide means for 25 the other. subscribers on the line has reclosing this circuit whenever the telephone moved his receiver from the hook and is atreceiver is removed from the arm '21.

tempting to usethe telephone, 7 i The signal device comprises a buzzer -17 v My improvement comprises a signal de-; which is in. a shunt circuit 18 connecting at vice attached to each telephone and arone endito the terminal19 of the induction 30 ranged so that Whenever the receiver is coil and at the otherend being connected to taken froni thehook a signal will be sent a plurality of contacts 20 which are insuover thetelephone line giving the ring lated from each other. (lo-operating with number of the telephone being used. Therethe contacts'is a contact arm 21 pivoted at iore, whenever any subscribertakes his re- 22 and having a contact finger 23 adapted 5 ceiver off the hook a signal corresponding toinove over the contacts 20 as the arm 21. to'hisnumber will be sent over the line, and turns about its pivot. This contact arm 21 if the line is already in use, this signalwill is connected by a wire 24. to the battery be received by the parties using the line and terminal 11 and it is acted upon by a suit they will knowwho the intruder is. able spring 25 tending to turn it clockwise.

40 In order to give an understanding of the The contact arin21 is long enough to extend invention I haveiillustrated in the drawg underneaththe receiver-supporting arm 12 ings'a selected embodiment thereof which and the arrangement is such that when the will now be described after which the novel receiver 16 is supported on the arm 12 the features will be pointed out in the appended contact'arm 21 will be in the position shown 45 claim in Fig. 1. In this position the contact linger Fig. l is a diagrammatic view showing 23 rests 'on a block of insulation 26 und, the wiring in my improved indicator. therefore the circuit connected to thelocal Fig. 2 is a top plan view of the support battery 9 will be open. When the receiver for the telephone receiver. is removed from the hook 12 the latter is 50 Fig. 3. is a side view thereof partly in raised by its spring 1 1, and when this oc section. I curs the spring 25 will swing the contact Fig.4 is a front view. arm 21thus causing the finger 23 to wipe I Fig. 5 is a section on the line 5+5, Fig. 3. it over the contacts 20. i As this occurs the In the drawings I have illustrated the shunt circuit 18 w ll be closed and broken r The contacts will be arranged to cause the indicator circuit to be made and broken anumber of times corresponding to the ring number of the telephone.

If, for instance, the ring number oithe telephone is 3 then there will be three contacts 20, if the ring number is 5, there will be five contacts, it the .rlng number 1S 22,

then there will be four contacts, two of which will be wide contacts, and the others of which will be narrow contacts, so that as the finger '23 moves over the contacts two long and two short signals will be given. The indicator 1? is in the nature of the familiar buzzer, so that as the ling r23 is on anycontact a buzzing sound will be produced which will be transmitted over the line 6 through the induction coil l.

The arm 21 is also made use of to close the transmitter circuit and for this purpose I provide an additional contact 30 which is insulated from the contacts 20 and which is conected to the transmitter by the wire 310 forming part of the transmitter circuit. Thiscontzict 30 issituated so that the finger 23' will come to rest thereon when the parts have reached the limit of their spring-impelled niovel'nent and at this time the transmitter circuit is closed through the wire 24, the arm 21, contacts 23 and 30. The shunt circuit 18 will also be open so that no signal will be transmitted over the line.

The housing or casing of the telephone instrument which is shown at 34: has secured to it a guiding member 35 having a slot 36 through which the end of the arm 12 extends and also having a vertical guideway 37 of a r size to receive the head 33 formed on the end of an arm or neck 32 extending from the receiver 16. This neck 32 may conveniently be formed on a split ring 31 which can be clamped to the receiver, thus providing a structure which can be used with existing receivers. This guideway is open at the top, as shown at 35 and the guiding member is formed on its front face with a slot 39 adapted to receive the arm 32. The head 33 is formed with two spring fingers or pawls lt) and one side of the guideway 37 is formed with ratchet teeth She collar 31 is permanently secured to the telephone receiver and when the latter is to'be placed on the supporting arm 12 the head will be entered into the open upper end 38 of the guiding member 35 and will move downwardly in said guiding member and will engage the arm 12 in its downward movement and bring the latter to rest at the bottom of the slot 36 in a position shown in Fig. 3.

The lower end of the guiding slot 39 is widened as shown at'4l2 to permit the head 33 to be withdrawn therethrough when the receiver is to be removed.

The purpose of the lever 41 and the spring users 40 is to prevent the receiver from belifted upwardly in the guideway. When head 33 has once entered the guideway it cannot be withdrawn in a vertical direction but can only be withdrawn by moving it clear down into the position shown in Figs. 3, l and 5 and then withdrawing it laterally through the enlarged opening 12.

The lingers 40 will preferably extend slightly above the upper edge 43 of the enlarged opening 12 so that they will prevent the head 33 from sliding 05 from the end of the arm To remove the receiver the latter is tilted slightly so as to swing the under side of the head 33 0E from the end of the arm 1.2 and when this is done the fingers e30 will be disengaged from the upper edge of the opening 42 and said head may be readily withdrawn from the said openin l claim.

1. In a telephone, the combination with a transmitter and its local circuit, or a receiver-supporting arm which when depressed opens the local transmitter circuit and closes the ringing circuit and when raised opens the ringing circuit and closes the local transmitter circuit, an indicating circuit connected to the local transmitter circuit, an indicator in said indicating circuit, and means operative while the receiver-sup} porting arm is rising afte the receiver been removed but before the transmitter circuit is closed to close the indicating circuit 2. In a telephone, the combination witha 3. In a telephone having a transmitter and its local circuit and a receiver-supporting arm, the combination with said'ciicuit and arm, of shunt indicating circuit connected to the transmitter circuit, a plurality of separate contacts connected to said shunt circuit in parallel, a contact-closing arm in said shunt circuit and adapted by its move ment to wipe over the contacts successively, said arm normally being held inoperative by the receiver-supporting arm, and means to give said contact arm its operative movement when the receiver is taken off from its supporting arm.

4. In a telephone, the combination with a casing having a slot, of a receiver-supporting arm extending through said slot, a guiding member secured to the casing and having a guideway extending at right angles to the arm, a collar adapted to be secured to the receiver and having a head movable through the guideway to engage the receiver-supporting arm, and means to prevent retrograde movement of said headin vertically-movable receiver-supporting arm said guideway, the latter I having an opening in its lower end through which the head may be withdrawn.

5. In a telephone, the combination with a of a receiver having a laterally-extending neck and a head at the end of the neck adapted to rest on said arm, a vertical guideway to receive the head, said uideway being constructed topermit freely downward movement of the head but to prevent upward movement thereof, and also having an opening at its lower end through which the head can be laterally withdrawn from the arm.

Q In testimony whereof, I have signed my name to this specification.

WILLIAM H. EASTMAN. 

